... does that mean deep down somewhere they wish it had worked out with their exes and are vulnerable to leaving their new men for another shot with them? I know there are different cases, but generally speaking...

Are you worried whenever your girl is overly concerned with her ex? Because if she's so happy and content, why would she feel the need to rub it in the ex's face?

"Oh boy, you had your chance and you blew it.. now sit back and watch anotha n1gga do it"